Free online VIV to OPUS converter

Some older VivoActive recordings use the .viv extension, while current audio players and messaging systems commonly expect .opus. Converting usually means extracting the audio track from the VIV video and encoding it as Opus; any video track is discarded.

What the VIV format is

VIV is an uncommon, legacy video format associated mainly with VivoActive and Vivo Software products. A VIV file may contain compressed video, audio, or both, and the extension alone does not identify one fully standardized codec. You may encounter it in old downloaded videos, archived media, or files produced by software that used the VivoActive format.

Because support varies between applications, first inspect the file rather than assuming it contains a playable audio stream. FFmpeg's ffprobe can show the detected container and streams:

ffprobe input.viv

What the OPUS format is

Opus is a modern, lossy audio codec normally stored in an Ogg container with the .opus extension. It supports speech, music, and variable bit rates; typical speech files use 24–64 kbps, while music commonly uses 96–160 kbps.

OPUS is suitable for voice recordings, calls, web playback, and storage where file size matters. It is not a video format, so converting a VIV file to OPUS preserves only an audio stream. Players and editors must support both the Opus codec and the Ogg Opus container.

How to actually convert VIV to OPUS

FFmpeg is the most practical desktop tool when it recognizes the VIV container and its codecs. Install a build that includes the libopus encoder, place the source file in a working folder, and run:

ffmpeg -i input.viv -map 0:a:0 -c:a libopus -b:a 96k output.opus

The -map 0:a:0 option selects the first audio stream and prevents an unrelated video stream from being copied. Change 96k to 64k for speech or 128–160 kbps for music. To preserve the source channel layout and avoid unnecessary resampling, FFmpeg normally chooses suitable defaults automatically.

If the VIV file contains multiple audio tracks, list them with ffprobe input.viv, then select another stream, such as:

ffmpeg -i input.viv -map 0:a:1 -c:a libopus -b:a 96k output.opus

For a graphical workflow, VLC may open some VIV variants: use Media → Convert/Save → Add, select the file, choose Convert/Save, select an audio profile using Opus, specify output.opus, and start the conversion. VLC's VIV support depends on the particular file and installed codecs.

You can also convert the file for free on 101convert.com without installing software. If the service cannot read the file, the VIV variant may require the original VivoActive application or a legacy decoder before it can be encoded as Opus.

Quality, compatibility, and limitations

Opus conversion is lossy. Encoding an already compressed VIV audio track cannot restore discarded detail; use a higher Opus bit rate when quality matters, but do not expect a lossless result. If the source has no audio stream, it cannot produce a meaningful OPUS file.

FFmpeg may report errors such as Invalid data found when processing input when the file is damaged, uses a VIV variant it does not support, or is not actually a VIV media file despite its extension. Renaming the file does not convert it. In that case, open it with the software that created it, export to WAV or another FFmpeg-supported format, and encode the exported audio with:

ffmpeg -i intermediate.wav -c:a libopus -b:a 96k output.opus

Keep the original VIV file because conversion to OPUS removes video, metadata unsupported by the Ogg container, and any audio information lost during re-encoding.